LG LG-P350 - Main LCD Trouble

4. TROUBLE SHOOTING
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Only for training and service purposes
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Press END key to tun the power On
Is the circuit powered?
Yes
END
Follow the Power ON
trouble shooting
No
LCD display OK?
START
No
Check Power
VREG_LCD_1.8V(TP1)
VREG_LCD_2.8V(TP2)
No
Change the Main board
Disconnect and reconnect
LCD connector
Change the LCD module
The LCD works
Yes
Yes
Yes
4.14 Main LCD trouble
Main LCD control signals are generated by MSM7227.
Those signal’s path are : MSM7227 -> LCD Module